Post content scrolling issues #23

Post contents have a couple issues with scrolling right now. First of all, though, to lay out how it should work: post contents should be able to scroll horizontally, to accommodate content that is larger than the page, but they should not be able to scroll vertically. This is not working in a couple cases:

On blog posts, content can overflow horizontally and we do not have the proper scrolling styles: https://4coder.handmade.network/blog/p/3411-new_features_p2__memory_management_variables_and_objects
In some cases, vertical scrollbars with only 1px of scroll are appearing on post content. This seems to happen in Edge on Windows on this thread: https://hero.handmade.network/forums/t/8097-mem_reserve_style_arena_and_obj_file_format_parser